Silicon-cored pipe and preparation method thereof

A technology of silicon core tube and polymer flame retardant, which is used in instruments, optical components, optics, etc., can solve the problem of flame retardant reducing the mechanical properties of silicon core tube, low thermal deformation temperature of polyethylene, and poor resistance to environmental stress cracking. and other problems, to achieve the effect of improving the melt viscosity is too high, improving the safety of use, and excellent resistance to environmental cracking.

Active Publication Date: 2021-01-29
任丘市长江邮电器材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-density polyethylene has excellent low temperature resistance, high impact resistance, wear resistance, and good electrical properties, but poor environmental stress cracking resistance and short service life; low-density polyethylene has good flexibility and impact resistance , but the strength is low, the heat distortion temperature is low, and the heat resistance is poor, which will cause the pipe to deform for a long time, thereby affecting its service life. Therefore, the above two polyethylenes have great defects as silicon core pipe materials
[0005] In order to make up for the above defects, the commonly used method is to mix low-density polyethylene and high-density polyethylene. In order to increase the strength, a large amount of high-density polyethylene needs to be added, and high-density polyethylene is a material that is extremely

Method used

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  • Silicon-cored pipe and preparation method thereof
  • Silicon-cored pipe and preparation method thereof
  • Silicon-cored pipe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] This embodiment first provides a polymer flame retardant, which is prepared by the following steps:

[0077] 1) Add 7g of oxalic acid to 90g of dimethyl sulfoxide, stir to dissolve, dissolve 5g of melamine in 50g of 35wt% methanol aqueous solution, and add dropwise to oxalic acid at a rate of 0.2mL / s In the solution, stir and react at 60°C and 400r / min for 4h. After the reaction is stopped, the reaction solution is suction-filtered and washed with methanol for 5 times, and then the product is dried in a vacuum oven at 60°C to obtain the amine salt;

[0078] 2) Mix 10g of amine salt with 10g of carboxyethylphenyl phosphoric acid, 2.5g of melamine, and 0.2g of ammonium phosphate, add it to 40g of deionized water, raise the temperature to 155°C under nitrogen protection, and stir at 400r / min for 4h ;

[0079] 3) Raise the temperature to 180°C, react for 2 hours, continue to raise the temperature to 230°C, react at 1.0 MPa for 8 hours, cool the reaction product to room tem...

Embodiment 2

[0102] This embodiment provides another silicon core tube. The components and preparation method are basically the same as those in Example 1, except that in this example, during the preparation of benzimidazole carboxylate grafted ultra-high molecular weight polyethylene, benzene The addition of imidazole carboxylate is 1g, that is, the addition weight ratio of ultra-high molecular weight polyethylene and benzimidazole carboxylate is 1:0.1, and the grafting rate of imidazole carboxylate grafted high molecular weight polyethylene is 9.3%. .

Embodiment 3

[0104] This embodiment provides another silicon core tube. The components and preparation method are basically the same as those in Example 1, except that in this example, during the preparation of benzimidazole carboxylate grafted ultra-high molecular weight polyethylene, benzene The addition of imidazole carboxylate is 3g, namely the addition weight ratio of ultra-high molecular weight polyethylene and benzimidazole carboxylate is 1:0.3, and the graft ratio of imidazole carboxylate grafted high molecular weight polyethylene is 19.1% .

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Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to a silicon-cored pipe and a preparation method thereof. According to the invention, a high-molecularanti-ultraviolet auxiliary agent is used as an auxiliary agent and added into a medium-density polyethylene matrix to prepare the silicon-cored pipe, has good compatibility with the polyethylene matrix, can overcome the defect that an inorganic flame retardant is difficult to disperse, is uniformly distributed in the pipe, and gives full play to the flame retardant property of the pipe; and the prepared silicon-cored pipe is of a double-layer pipe structure, and the double-layer structure endows the silicon-cored pipe with high strength and excellent flame retardance, and the silicon-cored pipe has excellent friction resistance and environmental cracking resistance and has extremely high use safety performance.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a silicon core tube and a preparation method thereof. [0002] technical background [0003] The silicon core tube was invented by the American AT&T company in the 1980s. The silicon core tube is a kind of tube with a solid lubricating layer formed by extruding silicone plastic into a high-density polyethylene tube synchronously. The lubricating layer can reduce the friction resistance of light and cable repeatedly drawn in the pipe. Compared with the traditional cement, PVC sub-pipe and other protective pipes, the silicon core pipe has the advantages of easy installation and laying, good smoothness, stable quality, Long service life and other characteristics, so it is often used as a protective pipe for optical cables or cables. When the silicon core tube is used as a cable duct, it needs to have flame retardant properties, otherwise, when the internal cabl...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/36C08K13/06C08K9/06C08K9/02C08K7/06C08K5/13G02B6/44
CPCC08L23/06G02B6/4401C08L2201/02C08L23/36C08K13/06C08K9/06C08K9/02C08K7/06C08K5/13
Inventor 陈保清卢方舟陈兆行
Owner 任丘市长江邮电器材有限公司
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